docs: def close(self):
          """Cleanly shutdown the connection to RabbitMQ
  
          :raises: sprockets.mixins.amqp.ConnectionStateError
  
          """
          if not self.closable:
              LOGGER.warning('Closed called while %s', self.state_description)
              raise ConnectionStateError(self.state_description)
          self.state = self.STATE_CLOSING
          LOGGER.info('Closing RabbitMQ connection')
          self.connection.close()